Note: The information contained herein is provided as-is. It was complied from various references given at the end of the page. The author believes all information presented here is accurate. But if you disagree, kindly drop me a mail.

This page provides a cross reference table for unambiguous/one-to-one mapping between the TIS 620-2533:1990 and ISO/IEC 10646-1:1993 character set standards. Coded values for TIS 620 are in hexadecimal while such for 10646 use Unicode BMP short form (the symbol U+ followed by a two-octet hexadecimal coded value).

The "lower" part of the TIS 620 table strictly follows codepoint assignments of graphics character in ISO 646 (US-ASCII).

The second part of TIS 620 covers the definition of Thai characters. The structure of codepoint assignments in TIS 620 and 10646 resembles each other very much.

Note: Special attention should be paid on codepoint A0. Contrary to many people's belief that TIS 620 defines codepoint A0 as no-break space (U+00A0), the standard does not assign any character to this codepoint. Codepoints A0 as well as DB-DE and FC-FF are not part of the standard. Interpretations of these unassigned codepoints are implementation specific and may vary from implementation to implementation. To ensure full data interchangeability among various applications, it is suggested that Thai software implementors follows the TIS 620 standard strictly.

References

1. TIS 620-2533 Standard for Thai Character Codes for Computers (in Thai), Thai Industrial Standards Institute
2. Thai Information Technology Standards, On-line resources at the National Electronics and Computer Technology Center (NECTEC)
3. ISO/IEC 10646-1, ISO/IEC JTC1/SC2
4. Thai block in Unicode 4.1, Unicode Consortium

[An annotated reference to the Thai implementations]